In 1900, Douglass made her singles debut at
Wimbledon, and after a bye in the first round, she lost her second-round match to
Louisa Martin. She won her first of seven ladies' singles titles three years later. On 6 April 1907, she married Robert Lambert Chambers and became known by her married surname Lambert Chambers. In 1908, she won the gold medal in the
women's singles event at the
1908 Summer Olympics after a straight-sets victory in the final against compatriot
Dora Boothby. She wrote
Tennis for Ladies, published in 1910. The book contained photographs of tennis techniques and advice on attire and equipment. In 1911, Lambert Chambers won the women's final at Wimbledon against
Dora Boothby 6–0, 6–0, the first player to win a
Grand Slam singles final without losing a game. This feat was repeated by
Steffi Graf when she defeated
Natalia Zvereva in the
1988 French Open final and then repeated by
Iga Swiatek in the 2025 Wimbledon women's singles final when she beat
Amanda Anisimova 6–0, 6–0 in 57 minutes. In 1919, Lambert Chambers played the longest Wimbledon final up to that time: 44 games against Frenchwoman
Suzanne Lenglen. Lambert Chambers held two match points at 6–5 in the third set but eventually lost to Lenglen 8–10, 6–4, 7–9. Lambert Chambers only played sporadic singles after 1921 but continued to compete in doubles until 1927. She made the singles quarterfinals of the U.S. Championships in 1925, and from 1924 to 1926, she captained Britain's
Wightman Cup team. In the
1925 Wightman Cup, she played, at the age of 46, a singles (against
Eleanor Goss) and doubles match and won both. In 1928 she turned to professional coaching. Lambert Chambers was posthumously inducted into the
International Tennis Hall of Fame in 1981. She died in Kensington, London in 1960, aged 81. == Grand Slam finals ==